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Railways Sample Paper RRB (Group D) Sample Test Paper-9

  • question_answer
    A sum of Rs. 400 becomes Rs. 448 at simple interest in 2 years. In how many years will the sum of Rs.550 amounts to Rs. 682 at the same rate?

    A)  2                    

    B)  3

    C)  3.5      

    D)   4

    Correct Answer: D

    Solution :

    [d] Here, P=400 A=448 T=2years R=? \[\therefore \]A=P+S.I \[\therefore \]S.I=\[A-\,P\] \[=448-\,400=48\] \[48=\frac{400\times R\times 2}{100}\] \[\therefore \,\,\,R=\frac{48\times 100}{400\times 2}=6%\] Now P=550 A=682 R=6% T=? \[\therefore \,\,\,S-\,I=682-\,550=132\] \[\therefore \,\,\,132=\frac{550\times 6\times T}{100}\] .\[\therefore \,\,\,T=\frac{132\times 100}{550\times 6}=4\,\,Year\]


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